Rockwell Automation 1784-PCIDS DeviceNet PCI Communication Interface Card - Manual (Page 57)

Interpret Status Indicators (LEDs) 7-5
Publication 1784-IN004E-EN-P - April 2005
Network (NET) Status Indicator
This bi-color (green/red) LED indicates the status of the communication link.
condition status indicates
off not powered,
not online
Device is not online.
The device has not completed the Dup_MAC_ID test yet.
The device may not be powered; look at the Module Status
LED.
flashing green 1 online,
not connected
Device is online, but has no connections in the established
state.
The device has passed the Dup_MAC_ID test, is online, but
has no established connections to other nodes.
green link okay, online,
connected The device is online and has connections in the established
state.
flashing red 1 connection time-out One or more I/O connections are in the timed-out state.
red critical link failure Failed communication device. The device has detected an
error that has rendered it incapable of communicating on
the network (Duplicate MAC ID or Bus-off).
Check network integrity and baud rate of all devices. Then
cycle power to the card by shutting down and cycling power
to your computer.
1
The flash rate of the LED is approximately 1 flash per second. The LED should be on for approximately
0.5 seconds and off for approximately 0.5 seconds.